Upload & Sell: Off
I'm in a pickle. I've been scouring evilbay for a 90mm summicron-R pre ASPH, and I noticed the exact same lens, but in M mount. Aside from the R going to for less money and having a closer MFD than the M version, is there a reason to own one over the other?
it mounts on your camera and it's a different diameter.
i believe there is a slight difference but the designs are very similar optically.